Bluetooth connection to Arduino

I am a total newby, so please excuse my simple questions.

I need to create an App to connect with Arduino via Buletooth in order to send start and stopp commands.

I found this page:

I tried to replicate this tutorial: How to use the Bluetooth LE Component on Thunkable - YouTube
But when I search in “Add Components” in the left column there is mo Bluetooth component, why?

Thank you for your help!

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The tutorial was based on the old development UI. In the new UI, this component is in the Block Screen and not in the Design Screen any more.

How can I search publicated projects, using keywords like “bluetooth”? I could not find this option.

Can someone point me to a published project whith bluetooth connection, which I can copy, based on the NEW development UI?